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接地 地网 : 50 phrases in 12 subjects |
| Aviation | 2 |
| Computer networks | 1 |
| Electric machinery | 2 |
| Electronics | 17 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Information technology | 3 |
| Rail transport | 3 |
| Space | 1 |
| Technology | 15 |
| Telecommunications | 3 |
| United Nations | 1 |
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